CN111790093A - Dry powder extinguishing agent for flame retarding triethyl aluminum fire and preparation method thereof - Google Patents

Dry powder extinguishing agent for flame retarding triethyl aluminum fire and preparation method thereof Download PDF

Info

Publication number
CN111790093A
CN111790093A CN202010600606.4A CN202010600606A CN111790093A CN 111790093 A CN111790093 A CN 111790093A CN 202010600606 A CN202010600606 A CN 202010600606A CN 111790093 A CN111790093 A CN 111790093A
Authority
CN
China
Prior art keywords
powder
extinguishing agent
triethyl aluminum
fire
mixed powder
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202010600606.4A
Other languages
Chinese (zh)
Inventor
胡曰博
付俊尧
付传刚
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zibo Aierma Fire Fighting Equipment Co ltd
Qilu University of Technology
Original Assignee
Zibo Aierma Fire Fighting Equipment Co ltd
Qilu University of Technology
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Zibo Aierma Fire Fighting Equipment Co ltd, Qilu University of Technology filed Critical Zibo Aierma Fire Fighting Equipment Co ltd
Priority to CN202010600606.4A priority Critical patent/CN111790093A/en
Publication of CN111790093A publication Critical patent/CN111790093A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62D—CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
    • A62D1/00—Fire-extinguishing compositions; Use of chemical substances in extinguishing fires
    • A62D1/0007—Solid extinguishing substances
    • A62D1/0014—Powders; Granules
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62D—CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
    • A62D1/00—Fire-extinguishing compositions; Use of chemical substances in extinguishing fires
    • A62D1/06—Fire-extinguishing compositions; Use of chemical substances in extinguishing fires containing gas-producing, chemically-reactive components

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Fireproofing Substances (AREA)
  • Fire-Extinguishing Compositions (AREA)

Abstract

The invention discloses a dry powder extinguishing agent for flame retarding triethyl aluminum fire and a preparation method thereof; the fire extinguishing agent comprises the following components in percentage by mass: 50-70% SiO2；7～20％NaHCO3；2～7％KHCO3；1～4％CaO；1～3％Al(OH)3. The dry powder extinguishing agent provided by the invention mainly utilizes silicon dioxide powder in the fire retardant to effectively cover flame of triethyl aluminum, so that the flame is isolated from oxygen in the air and further combustion is prevented; meanwhile, carbon dioxide generated by decomposing the two additives of sodium bicarbonate and potassium bicarbonate is utilized to quickly dilute or disperse oxygen in the air in the combustion area range of the triethyl aluminum, so that the oxygen content is reduced, and the further flame retardant effect is achieved; in addition, the strong carbon dioxide airflow generated by the two additives of sodium bicarbonate and potassium bicarbonate in the decomposition process can also instantly extinguish the sparks of triethyl aluminumThe effect of (1).

Description

Dry powder extinguishing agent for flame retarding triethyl aluminum fire and preparation method thereof
Technical Field
The invention relates to the technical field of fire fighting, in particular to a dry powder extinguishing agent for flame retarding triethyl aluminum fire and a preparation method thereof.
Background
Generally, fires fall largely into the category A, B, C, D, E, F, each type of fire being associated with a fire suppressant to retard its combustion.
At present, the dry powder extinguishing agent aiming at the above fire disasters is available on the market: for example, a class a fire refers to a fire of a solid substance, which generally has the properties of an organic substance and generally generates a burning ember during combustion, such as a fire of wood, coal, cotton, wool, hemp, paper, etc.; class B fires, primarily liquid or meltable solid matter fires; fire hazards such as kerosene, diesel oil, crude oil, methanol, ethanol, asphalt, paraffin and the like; class C fires refer to gas fires; fire hazards such as coal gas, natural gas, methane, ethane, propane, hydrogen, etc.; the fire extinguishing agent for the class D fire mainly aims at the fire extinguishing agent for flammable metal or metal alkyl substances.
Aiming at fire flame-retardant fire extinguishing agents generated by triethyl aluminum, alkyl aluminum D type fire extinguishing agents are mainly adopted in the market, the components mainly comprise borax, sodium chloride, potassium chloride, barium chloride, sodium carbonate, graphite and the like, and the fire extinguishing agent group covers flame of the triethyl aluminum by powder to realize isolation from oxygen in the air and enable the flame not to be re-combusted. However, the fire extinguishing agent can isolate oxygen in the air by covering flame with powder, and a problem that a part of sparks are not covered by the fire extinguishing agent powder and reburning occurs is often caused.
Disclosure of Invention
In view of the above problems, one of the problems to be solved by the present invention is to provide a dry powder extinguishing agent for fire retarding triethyl aluminum fire.
The second problem to be solved by the invention is to provide a preparation method of the dry powder extinguishing agent for fire retarding triethyl aluminum fire.
The technical scheme of the invention is as follows:
the invention provides a disaster dry powder extinguishing agent for flame-retardant triethyl aluminum fire, which comprises the following components in percentage by mass:
SiO2：50～70％，
NaHCO3：7～20％，
KHCO3：2～7％，
CaO：1～4％，
Al(OH)3：1～3％。
in one embodiment, the paint also comprises the following components in percentage by mass:
starch: 1-4%, and/or sodium dodecyl sulfate: 7-20%.
In one embodiment, the disaster dry powder extinguishing agent for fire retardation of triethyl aluminum fire comprises the following components in percentage by mass:
SiO2：60％，
NaHCO3：16％，
KHCO3：3％，
CaO：3％，
Al(OH)3：2％，
starch: 2 percent of the total weight of the mixture,
sodium lauryl sulfate: 14 percent.
In one embodiment, the paint also comprises the following components in percentage by mass:
starch: 2%, and/or sodium lauryl sulfate: 14 percent.
The invention also provides a preparation method of the dry powder extinguishing agent for flame-retardant triethyl aluminum fire, which comprises the following steps:
according to the mass percent, 7-20% of NaHCO3Powder and 2-7% KHCO3Adding the powder into another mixer, stirring and grinding for 5-10 minutes at room temperature to obtain mixed powder b for later use;
according to the mass percentage, 50-70% of SiO2Powder, 1-4% CaO powder, and 1-3% Al (OH)3Adding the powder into a mixer, and stirring and grinding for 7-20 minutes at room temperature; obtaining mixed powder c; standby;
and adding the mixed powder b into the mixed powder c, and mixing for 20-40 minutes to obtain the dry powder extinguishing agent for retarding the flame of the triethyl aluminum fire.
In one embodiment, the preparation method further includes, before adding the mixed powder b to the mixed powder c, the following steps:
mixing 1-4% of starch and 7-20% of sodium dodecyl sulfate according to mass percent, and stirring for 7-20 minutes at room temperature to obtain mixed powder a; and then sequentially adding the mixture A and the mixture B into the mixture C, and mixing for 20-40 minutes to obtain the dry powder extinguishing agent for retarding the fire of the triethyl aluminum.
In one embodiment, the preparation method comprises the following steps:
according to the mass percent, 16 percent of NaHCO is added3Powder and 3% KHCO3Adding the powder into another mixer, and stirring and grinding for 5-10 minutes at room temperature to obtain mixed powder b for later use;
mixing 60% of SiO2Powder, 3% CaO powder, and 2% Al (OH)3Adding the powder into a mixer, and stirring and grinding for 7-20 minutes at room temperature; obtaining mixed powder c; standby;
and adding the mixed powder b into the mixed powder c, and mixing for 20-40 minutes to obtain the dry powder extinguishing agent for retarding the flame of the triethyl aluminum fire.
In one embodiment, the preparation method further includes, before adding the mixed powder b to the mixed powder c, the following steps:
mixing 2% of starch and 14% of sodium dodecyl sulfate according to the mass percentage, and stirring for 7-20 minutes at room temperature to obtain mixed powder a; and then sequentially adding the mixture A and the mixture B into the mixture C, and mixing for 20-40 minutes to obtain the dry powder extinguishing agent for retarding the fire of the triethyl aluminum.
In one embodiment, in the preparation method, the particle size of the mixed powder b is 0.1-0.5 mm.
In one embodiment, in the preparation method, the particle size of the mixed powder c is 0.1-0.5 mm.
In one embodiment, in the preparation method, the particle size of the mixed powder b is 0.25 mm.
In one embodiment, in the preparation method, the particle size of the mixed powder c is 0.25 mm.
The dry powder extinguishing agent for flame retarding triethyl aluminum fire provided by the invention is mainly characterized in that silicon dioxide powder in a flame retardant is used for effectively covering flame of triethyl aluminum, so that the flame of triethyl aluminum is isolated from oxygen in the air and further combustion is prevented; meanwhile, carbon dioxide generated by decomposing the two additives of sodium bicarbonate and potassium bicarbonate is utilized to quickly dilute or disperse oxygen in the air in the combustion area range of the triethyl aluminum, so that the oxygen content is reduced, and the further flame retardant effect is achieved; in addition, the strong carbon dioxide airflow generated by the two additives of sodium bicarbonate and potassium bicarbonate in the decomposition process can also play a role in instantly extinguishing the sparks or flames of triethyl aluminum.
Drawings
FIG. 1 is a flow chart of a preparation process of the dry powder extinguishing agent for retarding fire of triethyl aluminum provided by the invention.
Detailed Description
The preferred embodiments of the present invention will be described in further detail with reference to the accompanying drawings.
In the invention, the mixed powder a, b or c is only a mark and does not refer to a substance; is an identification number of the mixed powder which is provided for the convenience of discussion.
The invention provides a dry powder extinguishing agent for flame-retarding triethyl aluminum fire, belonging to D-class fire extinguishing agents; the chemical general formula is as follows: 70SiO2·20NaHCO3·5CaO·3KHCO3·2Al(OH)35 sodium lauryl sulfate 5 starch; the paint comprises the following components in percentage by mass:
SiO2：50～70％，
NaHCO3：7～20％，
KHCO3：2～7％，
CaO：1～4％，
Al(OH)3：1～3％。
in a better embodiment, the dry powder extinguishing agent further comprises the following components in percentage by mass: starch: 1-4%; or the dry powder extinguishing agent also comprises the following components: sodium lauryl sulfate: 7-20%; or the dry powder extinguishing agent also comprises the following components: starch: 1-4%, and sodium dodecyl sulfate: 7-20%.
Among the components of the fire extinguishing agent for fire retardation of triethyl aluminum, SiO2As a flame retardant for triethyl aluminum fuel. SiO 22Low cost, easy crushing, stable chemical property and good inertia, is not easy to generate chemical reaction under the general state, and has good flame retardant effect. When in use, SiO2The powder is directly covered on the triethyl aluminum fuel to isolate the triethyl aluminum fuel from oxygen in the air and prevent further combustion.
NaHCO3And KHCO3CO produced by two additives after decomposition by heat2Oxygen in the air in the combustion area range of the triethyl aluminum can be quickly diluted or dispersed, the oxygen content is reduced, and the effect of further flame retardance is achieved; in addition, NaHCO3And KHCO3CO instantaneously generated in the decomposition process of the two additives2The strong airflow can also play an instant extinguishing effect on the sparks of the triethyl aluminum.
CaO and Al (OH)3As an alkaline powder substance, the flame retardant also has the effect of flame retarding triethyl aluminum.
Starch is a hydrophilic substance with high water absorption; the flame retardant triethyl aluminum flame retardant can absorb moisture in the flame to form viscous slurry, generates expansive force in the heating process to form bubbles, continuously enlarges the coverage surface on the surface of triethyl aluminum, further resists flame, and improves the fire extinguishing effect. The starch can be one or more of mung bean starch, potato starch, wheat starch, sweet potato starch, water caltrop starch, lotus root starch, water chestnut starch, corn starch, taibai powder, sweet potato powder, arrowroot, tapioca flour, sago coconut starch, crystal flour, starch, etc.
Name of sodium dodecyl sulfate: sodium dodecyl sulfate, Sodiumdo Decylsulfate (SDS) alternative name: sodium coco (or lauryl) sulfate, K12, foaming agentAnd the like. The chemical formula is as follows: c12H25—OSO3Na is a nontoxic anionic surfactant and plays roles of emulsification and foaming in the fire extinguishing agent component, so that an emulsion layer is formed on the surface of powder of the powder component and the powder fire extinguishing agent is dispersed in a foaming manner, and the effects of powder covering in a large area range and flame retarding of triethyl aluminum flame are formed as far as possible.
In the invention, the triethyl aluminum is colorless liquid, has very active chemical property, can be quickly oxidized even naturally when contacting with air, and can be strongly reacted with water when meeting water to produce the aluminum hydroxide (Al (OH)3) And ethane, and generate a large amount of heat, and even explode. One innovation of the invention is Al (OH)3Which, when flame-retarded with triethyl aluminium, will give rise to some free Al3+Ion, and triethylaluminium ((CH)3CH2)3Al) also generates Al when burned3+Ionic, and among the fire extinguishing agents are Al (OH)3Produce a certain amount of free Al3+Ions; at this time, the principle of equilibrium of chemical reaction, Al (OH)3Produced Al3+The ions will promote Al generated by triethyl aluminum3+Ions resulting in Al in the triethylaluminum product3+The concentration of the ions is increased, so that the heating reaction of the triethyl aluminum is promoted to be carried out in the direction of producing the triethyl aluminum, namely, the decomposition of the triethyl aluminum is hindered, and the possibility of explosion reaction of the triethyl aluminum caused by heating is prevented. That is, Al (OH) is known as a thermodynamic equilibrium mechanism of chemical reaction3Free Al is generated3+Al produced by triethyl aluminum with ions as products3+Ions are also products, and the reaction formula is as follows:
Al(OH)3——Al3+；
(CH3CH2)3Al——Al3+。
from the two chemical reaction formulas and the equilibrium mechanism of the chemical reaction, Al is formed in the forward direction of triethyl aluminum3+The reaction in the ion direction is caused by Al (OH)3Produced Al3+Al in the product due to ions3+The ion concentration is increased so thatThe thermal decomposition reaction of the obtained triethyl aluminum is carried out in a direction favorable for the reverse direction (namely the direction for synthesizing the triethyl aluminum compound), so that the thermal decomposition reaction of the triethyl aluminum is prevented, and the occurrence of heating or combustion explosion of the triethyl aluminum is avoided or eliminated.
In addition, NaHCO3And KHCO3Carbon dioxide is generated after the aluminum triethyl phosphate is heated and decomposed, so that the aluminum triethyl phosphate can be quickly isolated from oxygen in the air, and further combustion of the aluminum triethyl phosphate is prevented; SiO 22The powder is dispersed and covered on the surface of the triethyl aluminum to separate the triethyl aluminum from oxygen in the air. CaO can absorb moisture in air, so that the fire extinguishing agent has strong moisture resistance and can prevent the fire extinguishing agent from being affected with damp and caking. Thus, the present invention uses SiO2、NaHCO3、KHCO3、Al(OH)3And the like as the fire extinguishing agent powder component, has low cost and is easy to process, store and transport.
Therefore, the dry powder extinguishing agent of the invention mainly utilizes the silicon dioxide powder in the fire retardant to effectively cover the flame of triethyl aluminum, so that the flame is isolated from the oxygen in the air and further combustion is prevented; meanwhile, carbon dioxide generated after decomposition of the sodium bicarbonate and potassium bicarbonate additives is utilized to rapidly dilute or disperse oxygen in air in the triethyl aluminum combustion area range, so that the oxygen content in the air is reduced or the air is isolated, and the further flame retardant effect is achieved; in addition, the carbon dioxide strong airflow instantaneously generated by the sodium bicarbonate and the potassium bicarbonate during the decomposition process can also have the effect of instantaneously extinguishing the sparks of the triethyl aluminum; al (OH)3And the effect of heating explosion on the heating reaction of the triethyl aluminum can be achieved.
In one embodiment, the dry powder extinguishing agent for fire retarding triethyl aluminum fire comprises the following components in percentage by mass:
SiO2：60％，
NaHCO3：16％，
KHCO3：3％，
CaO：3％，
Al(OH)3：2％。
in a better embodiment, the dry powder extinguishing agent further comprises the following components in percentage by mass: starch: 2 percent; or the dry powder extinguishing agent also comprises the following components: sodium lauryl sulfate: 14 percent; or the dry powder extinguishing agent also comprises the following components: starch: 2%, and sodium lauryl sulfate: 14 percent.
As shown in figure 1, the preparation process flow of the dry powder extinguishing agent for retarding the fire of triethyl aluminum comprises the following steps:
s1, mixing 1-4% of starch and 7-20% of sodium dodecyl sulfate according to mass percent, and stirring for 7-20 minutes at room temperature to obtain mixed powder a; and (5) standby.
S2, mixing 7-20% of NaHCO by mass3Powder and 2-7% KHCO3Adding the powder into another mixer, stirring and grinding for 5-10 minutes at room temperature until the particle size of the mixed powder is 0.1-0.5 mm to obtain mixed powder b for later use;
s3, mixing 50-70% of SiO by mass2Powder, 1-4% CaO powder, and 1-3% Al (OH)3Adding the powder into a mixer, stirring and grinding for 7-20 minutes at room temperature until the particle size of the mixed powder is 0.1-0.5 mm to obtain mixed powder c; standby;
and S4, sequentially adding the mixed powder a and the mixed powder b into the mixed powder c, and mixing for 20-40 minutes to obtain the dry powder extinguishing agent for retarding the fire of the triethyl aluminum.
In the fire extinguishing agent, the particle size of the dry powder particles is more than or equal to 0.1 mm and less than or equal to 0.5 mm. The particles with the particle size are good in dispersity and not prone to agglomeration, can be dispersed when fire extinguishing is carried out and flame-retardant combustion substances are sprayed, and cover the surface of burning triethyl aluminum, the flame-retardant triethyl aluminum is further burnt, and the fire extinguishing effect of the fire extinguishing agent is improved.
In one embodiment, the preparation method comprises the following steps:
s11, mixing 2% of starch and 14% of sodium dodecyl sulfate according to mass percentage, and stirring and grinding for 7-20 minutes at room temperature to obtain mixed powder a;
s22, mixing 16% NaHCO by mass3Powder and 3% KHCO3Adding the powder into another mixer, and stirring and grinding for 5-10 minutes at room temperature until the particle size of the mixed powder is 0.25 mm to obtain mixed powder b for later use;
s33, mixing 60% SiO2Powder, 3% CaO powder, and 2% Al (OH)3Adding the powder into a mixer, stirring and grinding for 7-20 minutes at room temperature until the particle size of the mixed powder is 0.25 mm, and obtaining mixed powder c; standby;
and S44, sequentially adding the mixed powder a and the mixed powder b into the mixed powder c, and mixing for 20-40 minutes to obtain the dry powder extinguishing agent for retarding the fire of the triethyl aluminum.
The following description will be made with reference to several embodiments
Example 1
Weighing 10g of 1% starch and 200g of 20% sodium dodecyl sulfate powder according to the mass percentage, adding the starch and the 20% sodium dodecyl sulfate powder into a stirrer, and stirring for 20 minutes at room temperature to obtain mixed powder a for later use.
Weighing 20 percent of NaHCO according to mass percentage3200g of powder and 2% KHCO3Adding 20g of the powder into another mixer, stirring and grinding for 10 minutes at room temperature until the particle size of the mixed powder is 0.1 mm to obtain mixed powder b for later use;
weighing 50 percent of SiO according to the mass percentage2500g of powder, 4% of CaO powder, 3% of Al (OH)3Adding 30g of powder into a mixer, stirring and grinding for 20 minutes at room temperature until the particle size of the mixed powder is 0.1 mm to obtain mixed powder c; standby;
and (3) sequentially adding the prepared mixed powder a and the prepared mixed powder b into the mixed powder c, and mixing for 20 minutes in a mixer to obtain the dry powder extinguishing agent for resisting flame, namely triethyl aluminum fire.
Example 2
Weighing 40g of 4% starch and 70g of 7% sodium dodecyl sulfate powder according to the mass percentage, adding the weighed materials into a stirrer, and stirring for 7 minutes at room temperature to obtain mixed powder a for later use.
Weighing 10 percent of NaHCO according to mass percentage3Powder 100g, 7% KHCO3Adding 70g of the powder into another mixer, stirring and grinding for 20 minutes at room temperature until the particle size of the mixed powder is 0.3 mm to obtain mixed powder b for later use;
weighing 70 percent of SiO according to mass percentage2700g of powder, 1% CaO powder 10g, 1% Al (OH)3Adding 10g of the powder into a mixer, stirring and grinding for 7 minutes at room temperature until the particle size of the mixed powder is 0.5 mm to obtain mixed powder c; standby;
and (3) sequentially adding the prepared mixed powder a and the prepared mixed powder b into the mixed powder c, and mixing for 40 minutes in a mixer to obtain the dry powder extinguishing agent for retarding the fire of the triethyl aluminum.
Example 3
Weighing 20g of 2% starch and 140g of 14% sodium dodecyl sulfate powder according to the mass percentage, adding the weighed materials into a stirrer, and stirring the materials for 15 minutes at room temperature to obtain mixed powder a for later use.
Weighing 16 percent of NaHCO according to mass percentage3160g of powder and 3% KHCO3Adding 30g of the powder into another mixer, stirring and grinding for 8 minutes at room temperature until the particle size of the mixed powder is 0.25 mm to obtain mixed powder b for later use;
weighing 60 percent of SiO according to mass percentage2600g of powder, 30g of 3% CaO powder, 2% Al (OH)3Adding 20g of the powder into a mixer, stirring and grinding for 15 minutes at room temperature until the particle size of the mixed powder is 0.25 mm to obtain mixed powder c; standby;
and (3) sequentially adding the prepared mixed powder a and the prepared mixed powder b into the mixed powder c, and mixing for 30 minutes in a mixer to obtain the dry powder extinguishing agent for resisting flame, namely triethyl aluminum fire.
Comparative example 1
Weighing raw materials such as 2Kg of silicon dioxide, 5Kg of high ammonium polyphosphate, 2Kg of modified sodium chloride, 0.5Kg of K12 (anionic surfactant), 0.4Kg of stearic acid and 0.1Kg of starch according to the weight, adding the raw materials into a coulter type mixer for uniform mixing, and drying, crosslinking and curing in a drying furnace at 70-90 ℃ to prepare the required D class fire dry powder extinguishing agent.
Comparative example 2
10Kg of "Yushen" brand alkylaluminum fire extinguishing agent manufactured by Wuhan Yushen fire fighting Limited company, which was purchased from the market, was compared with the technical parameters of the extinguishing agents of examples 1 to 3, and the detection results are shown in Table 2.
The dry powder extinguishing agents in the embodiments 1-3 and the comparative examples 1-2 are respectively filled into five extinguishing tanks, and four extinguishers are respectively prepared according to the requirements of the public safety industry labeling of the people's republic of China (GA 979-; taking petroleum combustion as an example, fire extinguishing test tests are carried out under the same conditions according to the requirements of the design fire protection code of petrochemical enterprises GB50160-2008, and the test results of technical parameters are shown in Table 1.
TABLE 1 test results of technical parameters of extinguishing agents
Figure BDA0002556741370000101
From the test results, it can be seen that: 1. the formula of the fire extinguishing agent is superior to a comparative example in bulk density, and when the bulk density is maintained at 1.0 +/-0.2, the fire extinguishing agent has large porosity and wide coverage range during fire extinguishing; 2. in terms of the fluidity of the fire extinguishing agent, the fluidity is lower than 8.0s, which indicates that the fire extinguishing agent has a flowing covering effect and can increase the fire extinguishing covering area, and the fluidity of the fire extinguishing agent in the examples 1-3 is higher than that of the fire extinguishing agent in the comparative example; 3. the fire extinguishing efficiency in examples 1-3 is generally higher than that of the comparative example, and especially the fire extinguishing effect in example 3 is the best. In a word, the fire extinguishing agent for retarding the fire of the triethyl aluminum has a good fire extinguishing effect.
It should be understood that the above description is illustrative of the preferred embodiment of the present invention and is not to be construed as limiting the scope of the invention, which is defined by the appended claims.

Claims (10)

1. The dry powder extinguishing agent for flame-retardant triethyl aluminum fire is characterized by comprising the following components in percentage by mass:
SiO2：50～70％，
NaHCO3：7～20％，
KHCO3：2～7％，
CaO：1～4％，
Al(OH)3：1～3％。
2. a dry powder extinguishing agent according to claim 1, characterized by further comprising the following components in percentage by mass:
starch: 1-4%, and/or sodium dodecyl sulfate: 7-20%.
3. A dry powder extinguishing agent according to claim 1, which comprises the following components in percentage by mass:
SiO2：60％，
NaHCO3：16％，
KHCO3：3％，
CaO：3％，
Al(OH)3：2％。
4. a dry powder extinguishing agent according to claim 3, characterized by further comprising the following components in percentage by mass:
starch: 2%, and/or sodium lauryl sulfate: 14 percent.
5. A preparation method of a dry powder extinguishing agent for flame retarding triethyl aluminum fire is characterized by comprising the following steps:
according to the mass percent, 7-20% of NaHCO3Powder and 2-7% KHCO3Adding the powder into another mixer, stirring and grinding for 5-10 minutes at room temperature to obtain mixed powderBody b, ready for use;
according to the mass percentage, 50-70% of SiO2Powder, 1-4% CaO powder, and 1-3% Al (OH)3Adding the powder into a mixer, and stirring and grinding for 7-20 minutes at room temperature; obtaining mixed powder c; standby;
and adding the mixed powder b into the mixed powder c, and mixing for 20-40 minutes to obtain the dry powder extinguishing agent for retarding the flame of the triethyl aluminum fire.
6. The method according to claim 5, further comprising, before adding the mixed powder b to the mixed powder c, the steps of:
mixing 1-4% of starch and 7-20% of sodium dodecyl sulfate according to mass percent, and stirring for 7-20 minutes at room temperature to obtain mixed powder a; and then sequentially adding the mixture A and the mixture B into the mixture C, and mixing for 20-40 minutes to obtain the dry powder extinguishing agent for retarding the fire of the triethyl aluminum.
7. The method of claim 5, further comprising the steps of:
according to the mass percent, 16 percent of NaHCO is added3Powder and 3% KHCO3Adding the powder into another mixer, and stirring and grinding for 5-10 minutes at room temperature to obtain mixed powder b for later use;
mixing 60% of SiO2Powder, 3% CaO powder, and 2% Al (OH)3Adding the powder into a mixer, and stirring and grinding for 7-20 minutes at room temperature; obtaining mixed powder c; standby;
and adding the mixed powder b into the mixed powder c, and mixing for 20-40 minutes to obtain the dry powder extinguishing agent for retarding the flame of the triethyl aluminum fire.
8. The method according to claim 7, further comprising, before adding the mixed powder b to the mixed powder c, the steps of:
mixing 2% of starch and 14% of sodium dodecyl sulfate according to the mass percentage, and stirring for 7-20 minutes at room temperature to obtain mixed powder a; and then sequentially adding the mixture A and the mixture B into the mixture C, and mixing for 20-40 minutes to obtain the dry powder extinguishing agent for retarding the fire of the triethyl aluminum.
9. The method according to any one of claims 5 to 8, wherein the particle size of the mixed powder b is 0.1 to 0.5 mm; the particle size of the mixed powder c is 0.1-0.5 mm.
10. The method according to claim 9, wherein the mixed powder b has a particle size of 0.25 mm; the particle size of the mixed powder c is 0.3 mm.
CN202010600606.4A 2020-06-27 2020-06-27 Dry powder extinguishing agent for flame retarding triethyl aluminum fire and preparation method thereof Pending CN111790093A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010600606.4A CN111790093A (en) 2020-06-27 2020-06-27 Dry powder extinguishing agent for flame retarding triethyl aluminum fire and preparation method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010600606.4A CN111790093A (en) 2020-06-27 2020-06-27 Dry powder extinguishing agent for flame retarding triethyl aluminum fire and preparation method thereof

Publications (1)

Publication Number Publication Date
CN111790093A true CN111790093A (en) 2020-10-20

Family

ID=72804358

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202010600606.4A Pending CN111790093A (en) 2020-06-27 2020-06-27 Dry powder extinguishing agent for flame retarding triethyl aluminum fire and preparation method thereof

Country Status (1)

Country Link
CN (1) CN111790093A (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106730564A (en) * 2016-12-29 2017-05-31 大连亚泰科技新材料股份有限公司 A kind of ultra-fine dry powder extinguishing agent and preparation method thereof
US9675828B1 (en) * 2012-03-23 2017-06-13 AF3—American Firefighting Foam, LLC Methods and compositions for producing foam
CN110917551A (en) * 2018-09-19 2020-03-27 苏州吴越合成消防科技有限公司 Water sand dry powder extinguishing agent

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9675828B1 (en) * 2012-03-23 2017-06-13 AF3—American Firefighting Foam, LLC Methods and compositions for producing foam
CN106730564A (en) * 2016-12-29 2017-05-31 大连亚泰科技新材料股份有限公司 A kind of ultra-fine dry powder extinguishing agent and preparation method thereof
CN110917551A (en) * 2018-09-19 2020-03-27 苏州吴越合成消防科技有限公司 Water sand dry powder extinguishing agent

Non-Patent Citations (5)

* Cited by examiner, † Cited by third party
Title
中华人民共和国消防局: "《中国消防手册 第十二卷 消防装备 消防产品》", 31 December 2007, 上海科学技术出版社 *
孙军田 等: "《固定消防设施操作管理实用手册》", 31 May 2014, 中国人民公安大学出版社 *
张延松 等: "《ABC干粉和细水雾抑制甲烷爆炸研究》", 31 August 2018, 中国科学技术大学出版社 *
李本利 等: "《消防技术装备》", 31 August 2014, 中国人民公安大学出版社 *
杨亮: "《灭火剂与其标准化》", 31 January 2015, 科学技术文献出版社 *

Similar Documents

Publication Publication Date Title
US5053147A (en) Methods and compositions for extinguishing fires
EP2898925B1 (en) Phosphate fire-extinguishing composition
Zou et al. Inspiration from a thermosensitive biomass gel: A novel method to improving the stability of core-shell “dry water” fire extinguishing agent
CZ274492A3 (en) Mixtures for fire extinguishing
Ni et al. Application of water@ silica core-shell particles for suppressing gasoline pool fires
JPH02286179A (en) Fire extinguishing agent for metal fire and fire extinguishing method using this agent
Wang et al. Analysis of the effectiveness of Mg (OH) 2/NH4H2PO4 composite dry powder in suppressing methane explosion
Jiang et al. A bio-resourced and superhydrophobic dry water extinguishing agent for pool fire based on phytic acid and silicon
WO2024103869A1 (en) Silicon-based curing foam material for quickly obstructing forest fire and preparation method therefor
CN111790093A (en) Dry powder extinguishing agent for flame retarding triethyl aluminum fire and preparation method thereof
WO2019062076A1 (en) Hot aerosol fire extinguishing composition and preparation method therefor
CN115245647B (en) Combustion explosion inhibitor
US6001270A (en) Sticky high water content gels for extinguishers
CN110467833A (en) A kind of expansion-type transparent fire-retardant coating of aerogel-congtg and preparation method thereof
CN114768164A (en) Safe and efficient aerosol fire extinguishing agent and preparation method thereof
WO2019062075A1 (en) Composite aerosol fire extinguishing agent and preparation method therefor
CN111202937B (en) Dry powder fire extinguisher and preparation method thereof
CN107537126B (en) A kind of extinguishment combination with hot gas sol and preparation method thereof
US2322781A (en) Fire-extinguishing composition of matter
CN111450462A (en) Fire extinguishing agent for zirconium metal fire and preparation and use methods thereof
US3608641A (en) Preparation of fire-extinguishing material by heating dicyandiamide with alkali metal carbonates or bicarbonates
US2776942A (en) Fire extinguishing composition and method of extinguishing fires
Liu et al. Application of a novel a core-shell microstructured nanocomposites as a fire extinguishant using seawater
CN113521635B (en) Pearl powder type water-powder dual-purpose fire extinguishing agent and preparation method thereof
RU2075984C1 (en) Aerosol-forming fire-extinguishing composition

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
RJ01 Rejection of invention patent application after publication
RJ01 Rejection of invention patent application after publication

Application publication date: 20201020